JP4077375B2 - Manufacturing method of spring assembly - Google Patents

Manufacturing method of spring assembly Download PDF

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Publication number
JP4077375B2
JP4077375B2 JP2003190011A JP2003190011A JP4077375B2 JP 4077375 B2 JP4077375 B2 JP 4077375B2 JP 2003190011 A JP2003190011 A JP 2003190011A JP 2003190011 A JP2003190011 A JP 2003190011A JP 4077375 B2 JP4077375 B2 JP 4077375B2
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Japan
Prior art keywords
diameter
small
compression coil
coil spring
projection
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Expired - Fee Related
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JP2003190011A
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Japanese (ja)
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JP2005024003A (en
Inventor
政美 若森
寿恵 笛木
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Piolax Inc
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Piolax Inc
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Priority to JP2003190011A priority Critical patent/JP4077375B2/en
Application filed by Piolax Inc filed Critical Piolax Inc
Priority to EP04015498A priority patent/EP1493937B1/en
Priority to KR1020040050978A priority patent/KR100789768B1/en
Priority to US10/882,090 priority patent/US7357381B2/en
Priority to DE602004013888T priority patent/DE602004013888D1/en
Priority to MXPA04006530A priority patent/MXPA04006530A/en
Priority to CNB2004100624069A priority patent/CN100453256C/en
Publication of JP2005024003A publication Critical patent/JP2005024003A/en
Application granted granted Critical
Publication of JP4077375B2 publication Critical patent/JP4077375B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/10—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for 
    • B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for  by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/048—Springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/122—Attachments or mountings where coils, e.g. end coils, of the spring are rigidly clamped or similarly fixed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
    • F16F3/04—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction composed only of wound springs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49609—Spring making
    • Y10T29/49611—Spring making for vehicle or clutch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/4992—Overedge assembling of seated part by flaring inserted cup or tube end

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Springs (AREA)
  • Automatic Assembly (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、自動車の自動変速機のクラッチ機構における多板クラッチピストンの戻しばね手段などとして使用されるばね組立体の製造方法に関するものである。
【０００２】
【従来の技術】
従来のこの種ばね組立体は、具体的には図示しないが、２枚の円環状プレートと、これら各円環状プレート間の周方向に所定の間隔をおいて介装される複数の圧縮コイルばねとから成り、実際の組み付けに際しては、各円環状プレートの内側面に対向して形成された突起部の外周に圧縮コイルばねの座巻部をセットする状態を得て、かしめ用のポンチを使用して、各突起部を外側に拡径することにより、突起部の外周面と円環状プレートの内側面間とで圧縮コイルばねの座巻部を夫々挾持する構成となっている。
【０００３】
斯かる構成の下では、一方の円環状プレートに圧縮コイルばねの一端座巻部を組み付ける工程では、かしめ用のポンチを突起部に容易に接近させることができるので、突起部を比較的簡単にかしめることが可能となるが、他方の円環状プレートに圧縮コイルばねの他端座巻部を組み付ける工程では、各円環状プレート間の領域にかしめ用のポンチを容易に挿入することができないので、この場合には、極めて困難且つ煩雑な作業が強いられることとなる。
【０００４】
そこで、その対策として、従来にあっては、一方の円環状プレートに圧縮コイルばねの一端座巻部を組み付ける場合には、今まで通り、通常のかしめ用のポンチを使用して、その突起部をかしめるが、他方の円環状プレートに圧縮コイルばねの他端座巻部を組み付ける場合には、縦割りポンチと拡開ピンを用いてかしめる方法が提案されている。
【０００５】
具体的には、縦割りポンチは、突起部の内径より僅かに小さな外径を有して、その先端部が割り溝によって拡開可能に分割されており、拡開ピンは、他方の円環状プレートの突起部内に挿入できる外径を有して、その尖鋭先端部が上記縦割りポンチの割り溝内に導かれることにより、縦割りポンチの先端部を拡開できる構成となっている。
【０００６】
依って、かしめ作業を施すべき他方の円環状プレート側の突起部内に上記拡開ピンの尖鋭先端部を臨ませながら、既にかしめられている一方の円環状プレートの突起部内側から縦割りポンチの先端部を挿入して降下させると、拡開ピンの尖鋭先端部が割り溝内に導かれて、縦割りポンチの先端部を拡開させるので、これにより、突起部を外側に押し広げてかしめることが可能となる（例えば、特許文献１参照）。
【０００７】
【特許文献１】
特許第３２８８４５８号公報
【０００８】
【発明が解決しようとする課題】
従って、従来の製造方法にあっては、縦割りポンチと拡開ピンを使用することにより、他方の円環状プレートの突起部を容易にかしめることができるので、他方の円環状プレートと圧縮コイルばねとの組み付け作業が改善されることとなるが、反面、突起部をかしめる場合には、その全周を一律に拡径するものではなく、あくまでも、縦割りポンチの割り溝を介して分割された先端部で部分的に拡開するだけであるから、自ずと、圧縮コイルばねの他方の円環状プレートに対する保持力が低下して、圧縮コイルばねが外れてしまう恐れがあった。又、縦割りポンチ自体は、先端部が割り溝を介して分割されているので、先端部の強度に乏しく、容易に折損したり磨耗する恐れがあった。
【０００９】
【課題を解決するための手段】
本発明は、斯かる従来の製造方法が抱える課題を有効に解決するために開発されたもので、請求項１記載の発明は、２枚の円環状プレートと圧縮コイルばねとから成り、２枚の円環状プレートに形成された突起部をかしめることにより、各円環状プレートに圧縮コイルばねを組み付けるばね組立体の製造方法において、上記２枚の円環状プレートの夫々に大径突起部と小径突起部を形成する一方、圧縮コイルばねに上記大径突起部と対応する大径座巻部と小径突起部と対応する小径座巻部を形成し、大径突起部の外周に大径座巻部をセットして、当該大径突起部内に大径突起部の内径よりも大きな径部を有するポンチを挿入して拡径することにより、圧縮コイルばねの大径座巻部を各円環状プレートに組み付け、次いで、小径突起部の外周に小径座巻部をセットして、上記拡径した大径突起部の内側から当該小径突起部内に小径突起部の内径よりも大きな径部を有するポンチを挿入して拡径することにより、圧縮コイルばねの小径座巻部を各円環状プレートに組み付ける構成を採用した。
【００１０】
請求項２記載の発明は、請求項１を前提として、２枚の円環状プレートは同一形状を呈して、一方の円環状プレートと他方の円環状プレートの間で、各自の大径突起部と小径突起部とを対向させる構成を採用した。
【００１１】
依って、請求項１記載の発明にあっては、２枚の円環状プレートの夫々に大径突起部と小径突起部を形成する一方、圧縮コイルばねに大径突起部と対応する大径座巻部と小径突起部と対応する小径座巻部を形成して、各突起部をポンチを介して全周に亘って拡径することにより、圧縮コイルばねの大径座巻部と小径座巻部を各円環状プレートに組み付ける関係で、従来のものと比較すると、いずれの円環状プレートに対しても、圧縮コイルばねの各座巻部を確実に強固に保持することが可能となる。又、従来のような縦割りポンチを使用する必要がなくなるので、かしめ工具の耐久性も大いに向上する。
【００１２】
請求項２記載の発明にあっては、これに加えて、２枚の円環状プレートを同一形状となして、一方の円環状プレートと他方の円環状プレートの間で、各自の大径突起部と小径突起部とを対向させる関係で、円環状プレートを上下で共用できるので、頗る経済的となる。
【００１３】
【発明の実施の形態】
以下、本発明を図示する好適な実施の形態に基づいて詳述すれば、該実施の形態に係るばね組立体の製造方法も、基本的には、従来と同様に、図１に示す如く、上下２枚の円環状プレート１Ａ・１Ｂと、これら各円環状プレート１Ａ・１Ｂ間の周方向に所定の間隔をおいて介装される複数の圧縮コイルばね２とから成り、２枚の円環状プレート１Ａ・１Ｂに形成された各突起部３・４を外側に拡径することにより、突起部３・４の外周面と円環状プレート１Ａ・１Ｂの内側面間とで圧縮コイルばね２の両端座巻部２ａ・２ｂを挾持することを前提とするものであるが、特徴とするところは、下記の構成を採用した点にある。
【００１４】
即ち、まず、２枚の円環状プレート１Ａ・１Ｂに関しては、各自の対向する内面に円筒状の突起部を形成する場合には、共に、複数の大径突起部３と小径突起部４とを一つずつ交互にバーリング加工により一定の間隔をおいて形成して、両者１Ａ・１Ｂの位相をずらせて、一方の円環状プレート１Ａと他方の円環状プレート１Ｂの間で、各自の大径突起部３と小径突起部４とを夫々対向させることにより、同一形状を呈する２枚の円環状プレート１Ａ・１Ｂを上下で共用できる構成となしている。
【００１５】
又、複数の圧縮コイルばね２に関しては、上記各円環状プレート１Ａ・１Ｂの大径突起部３と対応する座巻部２ａを大径突起部３の外周にセットできる大径形状となし、逆に、小径突起部４と対応する座巻部２ｂを小径突起部４の外周にセットできる小径形状となして、図２に示す如く、その大径座巻部２ａを各円環状プレート１Ａ・１Ｂの大径突起部３に組み付け、同小径座巻部２ｂを各円環状プレート１Ａ・１Ｂの小径突起部４に組み付ける構成となしている。
【００１６】
依って、斯かる構成の下で、２枚の円環状プレート１Ａ・１Ｂ間に複数の圧縮コイルばね２を介装する場合には、まず、２枚の円環状プレート１Ａ・１Ｂに形成されている各大径突起部３に圧縮コイルばね２の大径座巻部２ａを組み付けることとなるが、この場合には、図３に示す如く、各円環状プレート１Ａ・１Ｂ毎で、大径突起部３の外周に圧縮コイルばね２の大径座巻部２ａをセットする状態を得て、圧縮コイルばね２の小径座巻部２ｂの内側から大径突起部３内に、大径突起部３の内径Ｄ１よりも大きな径部Ｄ２を有するポンチ５を挿入して、大径突起部３を外側に拡径すれば、これにより、図４に示す如く、圧縮コイルばね２の大径座巻部２ａが大径突起部３の外周面と各円環状プレート１Ａ・１Ｂの内側面間で全周において挾持されることとなる。従って、この時は、Ｄ１＜Ｄ２が成立することとなるが、Ｄ２は圧縮コイルばね２の小径座巻部２ｂの内径Ｄ３よりも小さいことは言うまでもない。
【００１７】
次に、２枚の円環状プレート１Ａ・１Ｂに形成されている各小径突起部４に圧縮コイルばね２の小径座巻部２ｂを組み付けることとなるが、この場合には、図５に示す如く、２枚の円環状プレート１Ａ・１Ｂの位相を一つずらせて、一方の円環状プレート１Ａと他方の円環状プレート１Ｂの間で、各自の大径突起部３と小径突起部４とを個々に対向させて、各小径突起部４の外周に各圧縮コイルばね２の小径座巻部２ｂをセットする状態を得て、小径突起部４の内径Ｄ４よりも大きな径部Ｄ５を有するポンチ６を用いて、既にかしめられて対向する大径突起部３の内側から、各円環状プレート１Ａ・１Ｂの小径突起部４方向に挿入して、各小径突起部４を外側に拡径すれば、これにより、図６に示す如く、圧縮コイルばね２の小径座巻部２ｂが小径突起部４の外周面と各円環状プレート１Ａ・１Ｂの内側面間で全周において挾持されることとなる。従って、この時は、Ｄ４＜Ｄ５＜Ｄ１の関係が成立している。
【００１８】
尚、特に、この場合には、既にかしめられている各円環状プレート１Ａ・１Ｂの大径突起部３の内側に上下方向から対応する全てのポンチ６を同時に挿入すれば、一工程で、各円環状プレート１Ａ・１Ｂに対して、各圧縮コイルばね２の小径座巻部２ｂを同時に組み付けることが可能となるので、作業性が頗る向上することとなる。
【００１９】
従って、本実施の形態にあっては、一方の円環状プレート１Ａ側に対しても、他方の円環状プレート１Ｂに対しても、各自の対向する大径突起部３と小径突起部４を全周に亘って一律に拡径することが可能となるので、従来の製造方法と比較すると、各円環状プレート１Ａ・１Ｂ側での圧縮コイルばね２の保持が確実強固となると共に、組み付け作業も大いに簡素化されることとなる。又、従来のような縦割りポンチを使用する必要がなくなるので、かしめ工具５・６の耐久性も大いに向上する。
【００２０】
尚、上記実施の形態においては、各円環状プレート１Ａ・１Ｂに対して、大径突起部３と小径突起部４とを一つずつ交互に形成したものであるが、本発明は、これに限定されるものではなく、組み付ける圧縮コイルばね２が偶数個である場合には、複数個ずつまとめて交互に形成したり、或いは、各円環状プレート１Ａ・１Ｂの片側半分に大径突起部３を形成し、残りの半分に小径突起部４を形成することも実施に応じ任意である。但し、実施の形態のように、一つずつ交互に形成すれば、円環状プレート１Ａ・１Ｂの剛性の均等化が図れることとなる。
【００２１】
【発明の効果】
以上の如く、本発明は、上記構成の採用により、２枚の円環状プレートの夫々に大径突起部と小径突起部を形成する一方、圧縮コイルばねに大径突起部と対応する大径座巻部と小径突起部と対応する小径座巻部を形成して、各突起部をポンチを介して全周に亘って拡径することにより、圧縮コイルばねの大径座巻部と小径座巻部を各円環状プレートに組み付ける関係で、従来のものと比較すると、いずれの円環状プレートに対しても、圧縮コイルばねの各座巻部を確実強固に保持することが可能となる。又、従来のような縦割りポンチを使用する必要がなくなるので、かしめ工具の耐久性も大いに向上する。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る製造方法により製造されるばね組立体を示す要部分解斜視図である。
【図２】円環状プレートの大径突起部と小径突起部に圧縮コイルばねの大径座巻部と小径座巻部を組み付けた状態を示す説明図である。
【図３】円環状プレートの大径突起部で圧縮コイルばねの大径座巻部をかしめる工程を示す説明図である。
【図４】円環状プレートの大径突起部で圧縮コイルばねの大径座巻部をかしめた状態を示す説明図である。
【図５】円環状プレートの小径突起部で圧縮コイルばねの小径座巻部をかしめる工程を示す説明図である。
【図６】円環状プレートの小径突起部で圧縮コイルばねの小径座巻部をかしめた状態を示す説明図である。
【符号の説明】
１Ａ 一方の円環状プレート
１Ｂ 他方の円環状プレート
２ 圧縮コイルばね
２ａ 圧縮コイルばねの大径座巻部
２ｂ 圧縮コイルばねの小径座巻部
３ 円環状プレートの大径突起部
４ 円環状プレートの小径突起部
５ ポンチ
６ ポンチ
Ｄ１ 大径突起部の内径
Ｄ２ ポンチの外径
Ｄ３ 小径座巻部の内径
Ｄ４ 小径突起部の内径
Ｄ５ ポンチの外径[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a spring assembly used as, for example, a return spring means of a multi-plate clutch piston in a clutch mechanism of an automatic transmission of an automobile.
[0002]
[Prior art]
This type of conventional spring assembly is not specifically shown, but includes two annular coil plates and a plurality of compression coil springs interposed at predetermined intervals in the circumferential direction between the annular plates. In actual assembly, use a caulking punch to obtain a state in which the end winding part of the compression coil spring is set on the outer periphery of the protrusion formed facing the inner surface of each annular plate Then, by expanding the diameter of each protrusion to the outside, the end coiled portion of the compression coil spring is held between the outer peripheral surface of the protrusion and the inner surface of the annular plate.
[0003]
Under such a configuration, in the step of assembling the one end winding portion of the compression coil spring to one of the annular plates, the caulking punch can be easily brought close to the protruding portion, so that the protruding portion can be made relatively simple. It is possible to caulk, but in the process of assembling the other end washer of the compression coil spring to the other annular plate, the caulking punch cannot be easily inserted into the area between the annular plates. In this case, extremely difficult and complicated work is forced.
[0004]
Therefore, as a countermeasure, in the past, when assembling the one end wound part of the compression coil spring to one annular plate, the conventional caulking punch is used as before, and the protruding part is used. However, when assembling the other end end wound portion of the compression coil spring to the other annular plate, a method of caulking using a longitudinally split punch and an expanding pin has been proposed.
[0005]
Specifically, the longitudinally split punch has an outer diameter that is slightly smaller than the inner diameter of the protrusion, and its tip is divided so as to be expandable by a split groove, and the expanding pin is the other annular ring It has an outer diameter that can be inserted into the protruding portion of the plate, and the tip of the sharp punch is led into the split groove of the vertical punch, so that the tip of the vertical punch can be expanded.
[0006]
Therefore, while the sharp tip portion of the expansion pin faces the projection portion on the other annular plate side to be caulked, the vertical punch is inserted from the inside of the projection portion of one annular plate that has already been caulked. When the tip is inserted and lowered, the sharp tip of the expansion pin is guided into the split groove and the tip of the vertical split punch is expanded, so that the protrusion can be pushed outward. It is possible to tighten (see, for example, Patent Document 1).
[0007]
[Patent Document 1]
Japanese Patent No. 3288458 [0008]
[Problems to be solved by the invention]
Therefore, in the conventional manufacturing method, the projection of the other annular plate can be easily caulked by using the vertically split punch and the expanding pin, so that the other annular plate and the compression coil The assembly work with the spring will be improved, but on the other hand, when caulking the protrusion, the entire circumference is not expanded uniformly, but it is only divided through the split groove of the vertical punch However, since the holding force of the compression coil spring with respect to the other annular plate is naturally reduced, the compression coil spring may be detached. Further, since the front end portion of the vertically split punch itself is divided through the split groove, the strength of the front end portion is poor, and there is a possibility that it is easily broken or worn.
[0009]
[Means for Solving the Problems]
The present invention was developed in order to effectively solve the problems of such a conventional manufacturing method, and the invention according to claim 1 comprises two annular plates and a compression coil spring. In the method of manufacturing a spring assembly in which a compression coil spring is assembled to each annular plate by caulking the projections formed on the annular plates, a large-diameter projection and a small-diameter are formed on each of the two annular plates. On the other hand, the compression coil spring is formed with a large-diameter end winding portion corresponding to the large-diameter protrusion and a small-diameter end winding portion corresponding to the small-diameter protrusion, and the large-diameter end winding is formed on the outer periphery of the large-diameter protrusion. The large-diameter end wound portion of the compression coil spring is inserted into each large annular plate by inserting a punch having a diameter larger than the inner diameter of the large-diameter projection into the large-diameter projection. And then on the outer periphery of the small diameter projection A compression coil is obtained by setting a diameter winding part and inserting a punch having a diameter larger than the inner diameter of the small-diameter protrusion into the small-diameter protrusion from the inside of the enlarged large-diameter protrusion. A structure in which the small-diameter end winding part of the spring is assembled to each annular plate is adopted.
[0010]
The invention according to claim 2 is based on claim 1 and the two annular plates have the same shape, and each of the large-diameter protrusions between the one annular plate and the other annular plate A configuration was adopted in which the small-diameter protrusions face each other.
[0011]
Therefore, in the first aspect of the invention, the large-diameter seat corresponding to the large-diameter protrusion is formed on the compression coil spring while the large-diameter protrusion and the small-diameter protrusion are formed on each of the two annular plates. A small-diameter end winding portion corresponding to the winding portion and the small-diameter projection portion is formed, and the diameter of each projection portion is expanded over the entire circumference via a punch, thereby allowing the large-diameter seat winding portion and the small-diameter end winding of the compression coil spring to be expanded. In relation to assembling the portion to each annular plate, it is possible to securely hold each end winding portion of the compression coil spring firmly with respect to any annular plate as compared with the conventional one. Further, since it is not necessary to use a conventional vertical punch, the durability of the caulking tool is greatly improved.
[0012]
In the invention according to claim 2, in addition to this, the two annular plates have the same shape, and each of the large-diameter protrusions between the one annular plate and the other annular plate. Since the annular plate can be shared by the upper and lower sides in such a relationship that the small-diameter protrusions face each other, it becomes economical.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, if the present invention is described in detail based on a preferred embodiment shown in the drawings, a method for manufacturing a spring assembly according to the embodiment is basically as shown in FIG. The upper and lower annular plates 1A and 1B and a plurality of compression coil springs 2 interposed at predetermined intervals in the circumferential direction between the annular plates 1A and 1B are provided. By expanding the diameter of the projections 3 and 4 formed on the plates 1A and 1B to the outside, both ends of the compression coil spring 2 are formed between the outer peripheral surface of the projections 3 and 4 and the inner side surfaces of the annular plates 1A and 1B. Although it is based on the premise that the end turns 2a and 2b are clamped, the feature is that the following configuration is adopted.
[0014]
That is, first, regarding the two annular plates 1A and 1B, when forming cylindrical projections on the inner surfaces facing each other, a plurality of large-diameter projections 3 and small-diameter projections 4 are both formed. Each one is formed with a certain interval by burring one after another, and the phase of both 1A and 1B is shifted, and each large-diameter projection between one annular plate 1A and the other annular plate 1B By making the portion 3 and the small-diameter protrusion 4 face each other, the two annular plates 1A and 1B having the same shape can be shared vertically.
[0015]
Further, the plurality of compression coil springs 2 have a large-diameter shape in which the end winding portions 2a corresponding to the large-diameter protrusions 3 of the annular plates 1A and 1B can be set on the outer periphery of the large-diameter protrusion 3, and vice versa. Further, the end turn part 2b corresponding to the small diameter protrusion part 4 is formed into a small diameter shape that can be set on the outer periphery of the small diameter protrusion part 4, and the large diameter end turn part 2a is connected to each of the annular plates 1A and 1B as shown in FIG. The small-diameter end winding portion 2b is assembled to the small-diameter projection portion 4 of each of the annular plates 1A and 1B.
[0016]
Therefore, when a plurality of compression coil springs 2 are interposed between the two annular plates 1A and 1B under such a configuration, first, the two annular plates 1A and 1B are formed. The large-diameter end winding portion 2a of the compression coil spring 2 is assembled to each large-diameter projection portion 3 in this case. In this case, as shown in FIG. 3, the large-diameter projection is provided for each of the annular plates 1A and 1B. A state in which the large-diameter end wound portion 2a of the compression coil spring 2 is set on the outer periphery of the portion 3 is obtained, and the large-diameter protrusion 3 is inserted into the large-diameter protrusion 3 from the inside of the small-diameter end winding 2b of the compression coil spring 2. If a punch 5 having a larger diameter portion D2 than the inner diameter D1 is inserted and the large-diameter projection 3 is expanded outward, the large-diameter end winding portion of the compression coil spring 2 is thereby obtained as shown in FIG. 2a is held on the entire circumference between the outer peripheral surface of the large-diameter projection 3 and the inner side surfaces of the annular plates 1A and 1B. It is the thing. Therefore, at this time, D1 <D2 is established, but it goes without saying that D2 is smaller than the inner diameter D3 of the small-diameter end wound portion 2b of the compression coil spring 2.
[0017]
Next, the small-diameter end winding portion 2b of the compression coil spring 2 is assembled to the small-diameter projections 4 formed on the two annular plates 1A and 1B. In this case, as shown in FIG. By shifting the phases of the two annular plates 1A and 1B by one, the respective large-diameter projections 3 and small-diameter projections 4 are individually arranged between one annular plate 1A and the other annular plate 1B. The punch 6 having a diameter D5 larger than the inner diameter D4 of the small-diameter projection 4 is obtained by setting the small-diameter end wound portion 2b of each compression coil spring 2 on the outer periphery of each small-diameter projection 4 Using this, if it is inserted from the inside of the large-diameter projection 3 that has already been crimped and opposed to the small-diameter projection 4 of each annular plate 1A, 1B, and the diameter of each small-diameter projection 4 is expanded outward, Thus, as shown in FIG. 6, the small-diameter end wound portion 2b of the compression coil spring 2 The be clamped all around between the outer peripheral surface of the small-diameter projection portion 4 and the inner surface of each annular plate 1A · 1B. Therefore, at this time, the relationship of D4 <D5 <D1 is established.
[0018]
In particular, in this case, if all the punches 6 corresponding to each of the annular plates 1A and 1B that have already been crimped are simultaneously inserted from the vertical direction into the inside of the large-diameter projections 3, Since the small-diameter end wound portions 2b of the respective compression coil springs 2 can be simultaneously assembled to the annular plates 1A and 1B, workability is improved.
[0019]
Accordingly, in the present embodiment, the large-diameter projections 3 and the small-diameter projections 4 that face each other are arranged on both the one annular plate 1A side and the other annular plate 1B. Since the diameter can be increased uniformly over the circumference, the holding of the compression coil springs 2 on the annular plates 1A and 1B side is surely strengthened as compared with the conventional manufacturing method, and the assembling work is also performed. It will be greatly simplified. Further, since it is not necessary to use a conventional vertical punch, the durability of the caulking tools 5 and 6 is greatly improved.
[0020]
In the above-described embodiment, the large-diameter protrusions 3 and the small-diameter protrusions 4 are alternately formed for each of the annular plates 1A and 1B. When the number of compression coil springs 2 to be assembled is an even number, it is not limited, and a plurality of compression coil springs 2 may be alternately formed at a time, or the large-diameter protrusion 3 may be formed on one half of each annular plate 1A, 1B. It is optional depending on the implementation to form the small-diameter protrusion 4 on the other half. However, if they are alternately formed one by one as in the embodiment, the rigidity of the annular plates 1A and 1B can be equalized.
[0021]
【The invention's effect】
As described above, the present invention adopts the above-described configuration to form a large-diameter projection and a small-diameter projection on each of the two annular plates, while the compression coil spring has a large-diameter seat corresponding to the large-diameter projection. A small-diameter end winding portion corresponding to the winding portion and the small-diameter projection portion is formed, and the diameter of each projection portion is expanded over the entire circumference via a punch, thereby allowing the large-diameter seat winding portion and the small-diameter end winding of the compression coil spring to be expanded. In relation to assembling the portion to each annular plate, it is possible to securely hold each end winding portion of the compression coil spring firmly with respect to any annular plate as compared with the conventional one. Further, since it is not necessary to use a conventional vertical punch, the durability of the caulking tool is greatly improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a main part showing a spring assembly manufactured by a manufacturing method according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing a state in which a large-diameter seat winding portion and a small-diameter seat winding portion of a compression coil spring are assembled to a large-diameter projection portion and a small-diameter projection portion of an annular plate.
FIG. 3 is an explanatory view showing a step of caulking a large-diameter end wound portion of a compression coil spring with a large-diameter protrusion of an annular plate.
FIG. 4 is an explanatory view showing a state in which a large-diameter end wound portion of a compression coil spring is caulked by a large-diameter protrusion of an annular plate.
FIG. 5 is an explanatory view showing a step of caulking a small-diameter end wound portion of a compression coil spring with a small-diameter protrusion of an annular plate.
FIG. 6 is an explanatory view showing a state in which a small-diameter end wound portion of a compression coil spring is caulked by a small-diameter protrusion of an annular plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1A One annular plate 1B The other annular plate 2 Compression coil spring 2a Large diameter seat winding part 2b of compression coil spring Small diameter seat winding part 3 of compression coil spring Large diameter projection part 4 of annular plate Small diameter of annular plate Projection 5 Punch 6 Punch D1 Large Diameter Projection Inner Diameter D2 Punch Outer Diameter D3 Small Diameter Cushion Inner Diameter D4 Small Diameter Projection Inner Diameter D5 Punch Outer Diameter

Claims (2)

２枚の円環状プレートと圧縮コイルばねとから成り、２枚の円環状プレートに形成された突起部をかしめることにより、各円環状プレートに圧縮コイルばねを組み付けるばね組立体の製造方法において、上記２枚の円環状プレートの夫々に大径突起部と小径突起部を形成する一方、圧縮コイルばねに上記大径突起部と対応する大径座巻部と小径突起部と対応する小径座巻部を形成し、大径突起部の外周に大径座巻部をセットして、当該大径突起部内に大径突起部の内径よりも大きな径部を有するポンチを挿入して拡径することにより、圧縮コイルばねの大径座巻部を各円環状プレートに組み付け、次いで、小径突起部の外周に小径座巻部をセットして、上記拡径した大径突起部の内側から当該小径突起部内に小径突起部の内径よりも大きな径部を有するポンチを挿入して拡径することにより、圧縮コイルばねの小径座巻部を各円環状プレートに組み付けることを特徴とするばね組立体の製造方法。In a method of manufacturing a spring assembly comprising two annular plates and a compression coil spring, and by assembling a compression coil spring to each annular plate by caulking projections formed on the two annular plates, A large-diameter projection and a small-diameter projection are formed on the two annular plates, respectively, while a large-diameter seat winding corresponding to the large-diameter projection and a small-diameter seat winding corresponding to the small-diameter projection on the compression coil spring. Forming a section, setting a large-diameter end winding part on the outer periphery of the large-diameter protrusion, and inserting a punch having a diameter larger than the inner diameter of the large-diameter protrusion into the large-diameter protrusion to expand the diameter. Assemble the large-diameter end winding portion of the compression coil spring to each annular plate, then set the small-diameter end winding portion on the outer periphery of the small-diameter projection portion, and the small-diameter projection from the inside of the expanded large-diameter projection portion A diameter larger than the inner diameter of the small-diameter projection in the part Spring assembly manufacturing method for by expanding the diameter by inserting a punch, characterized by assembling the small-diameter seat winding portion of the compression coil spring to each annular plate having. ２枚の円環状プレートは同一形状を呈して、一方の円環状プレートと他方の円環状プレートの間で、各自の大径突起部と小径突起部とを対向させたことを特徴とする請求項１記載のばね組立体の製造方法。The two annular plates have the same shape, and each of the large-diameter protrusions and the small-diameter protrusions are opposed to each other between one annular plate and the other annular plate. A method for manufacturing the spring assembly according to claim 1.
JP2003190011A 2003-07-02 2003-07-02 Manufacturing method of spring assembly Expired - Fee Related JP4077375B2 (en)

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JP2003190011A JP4077375B2 (en) 2003-07-02 2003-07-02 Manufacturing method of spring assembly
KR1020040050978A KR100789768B1 (en) 2003-07-02 2004-07-01 Method of manufacturing spring assembly
US10/882,090 US7357381B2 (en) 2003-07-02 2004-07-01 Method of manufacturing spring assembly
DE602004013888T DE602004013888D1 (en) 2003-07-02 2004-07-01 Spring unit and manufacturing method for it
EP04015498A EP1493937B1 (en) 2003-07-02 2004-07-01 Method of manufacturing spring assembly
MXPA04006530A MXPA04006530A (en) 2003-07-02 2004-07-02 Method of manufacturing spring assembly.
CNB2004100624069A CN100453256C (en) 2003-07-02 2004-07-02 Method of manufacturing spring assembly

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US7357381B2 (en) 2008-04-15
EP1493937B1 (en) 2008-05-21
KR100789768B1 (en) 2007-12-28
DE602004013888D1 (en) 2008-07-03
CN100453256C (en) 2009-01-21
JP2005024003A (en) 2005-01-27
KR20050004054A (en) 2005-01-12
MXPA04006530A (en) 2005-04-19
EP1493937A1 (en) 2005-01-05
CN1575914A (en) 2005-02-09
US20050017422A1 (en) 2005-01-27

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